Question

what is +M and -M effects​

Answer 1

Good morning friend...

here is your answer.....

Mesmeric Effect :-

when resonance is applied to a conjugated pie - system electron flow from one end to the order. This is called as mesmeric effect

this effect is of two types....

(1)+M effect :-

-------------------------------

In this case an atom or group donates electron to the conjugated pie system. So it is called as +M effect.

some electron donating group are :-

-OH, -Cl, -Br, -I, -NH2 etc.

(2) -M Effect :-

---------------------------------------

When an atom or group withdraw electron towards itself from the conjugated pie system through resonance. It is called as

-M effect.

Electron withdrawing groups are :-

-COOH, -CN, -CHO, -S3OH etc

hope this will help you...

Answer 2

Answer:

Good morning

Step-by-step explanation:

Hope it's help you

Please mark me as Brainliest